package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 套餐业务实现
 */
@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
   @Transactional
   public void saveWithDish(SetmealDTO setmealDTO){
       Setmeal setmeal=new Setmeal();
       BeanUtils.copyProperties(setmealDTO,setmeal);
       //向套餐表插入数据
       setmealMapper.insert(setmeal);
       //获取生成的套餐id
       Long setmealId =setmeal.getId();

       List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
       setmealDishes.forEach(setmealDish -> {
           setmealDish.setSetmealId(setmealId);
       });
       //保存套餐和菜品的关联关系
       setmealDishMapper.insertBatch(setmealDishes);
   }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getById(id);
            if(StatusConstant.ENABLE==setmeal.getStatus()){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        ids.forEach(setmealId->{
            setmealMapper.deletById(setmealId);
            setmealDishMapper.deleteBymealId(setmealId);
        });
    }

    /**
     * 根据id查询套餐和套餐菜品关系
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
     Setmeal setmeal=setmealMapper.getById(id);
     List<SetmealDish> setmealDishes=setmealDishMapper.getBySetmealId(id);

     SetmealVO setmealVO =new SetmealVO();
     BeanUtils.copyProperties(setmeal,setmealVO);
     setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    public void update(SetmealDTO setmealDTO){
        Setmeal setmeal =new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //1.修改套餐表，执行update
        setmealMapper.update(setmeal);
        //套餐id
       Long setmealDTOId =setmealDTO.getId();
        //2.删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBymealId(setmealDTOId);
        List<SetmealDish> setmealDishes =setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealDTOId);
        });
        //3.重新插入和菜品的关联关系，操作setmeal_dish表，执行insert
          setmealDishMapper.insertBatch(setmealDishes);
    }
}
